GT710 is kepler(likely on it’s way out soon) and only supports H.264 (AVCHD) YUV 4:2:0.
low end Maxwell cards(the 750) add H.264 (AVCHD) YUV 4:4:4 and H.264 (AVCHD) Lossless as well as at minimum another 2 years of support over kepler if things hold they way they have been
Newer pascal cards(the quadro’s I suggested) also add .265 (HEVC) 4K YUV 4:2:0 H.265 (HEVC) 4K YUV 4:4:4 H.265 (HEVC) 4K Lossless H.265 (HEVC) 8k
Which if you’re buying it as a hardware encoder will give it the longest usefull life. 30 isn’t bad for the GT710 if you only need H.264 (AVCHD) YUV 4:2:0 but you’re getting what you pay for